It is a calendar with beautiful fanart of Moondancer, scan found on Meshok net: essentially Russian ''Ebay'' alternative.

Unfortunately, Google/Yandex image search and Derpibooru do not recognize this piece, meaning the author is unknown. Hopefully someday they will be found.

I assume G3's logotype was added as it was gen of 2000s, and whoever made the calendar didn't know differences of G3 and G1.

Enjoy!~